Error in loading libraries in JavaCV in Android -

i'm trying implement simple face recognition code using javacv. i'm getting error , don't know why.

i have copied every .so file directories -> app/libs/armeabi , app/src/main/jnilibs copies javacpp.jar , javacv.jar app/libs directory

here's error :

caused by: java.lang.unsatisfiedlinkerror: dlopen failed: not load library "libopencv_contrib.so" needed "libjniopencv_contrib.so"; caused not load library "../../lib/libopencv_legacy.so" needed "libopencv_contrib.so"; caused library "../../lib/libopencv_legacy.so" not found @ java.lang.runtime.load(runtime.java:330) @ java.lang.system.load(system.java:511) @ com.googlecode.javacpp.loader.loadlibrary(loader.java:700) @ com.googlecode.javacpp.loader.load(loader.java:586) @ com.googlecode.javacpp.loader.load(loader.java:540) @ com.googlecode.javacv.cpp.opencv_contrib.(opencv_contrib.java:97) @ com.ifta.face.opencvfacerecognizer.recognise(opencvfacerecognizer.java:102) @ com.ifta.face.finalactivity.testpreviousimage(finalactivity.java:126) @ com.ifta.face.finalactivity.ontestclicked(finalactivity.java:50) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:525) @ android.view.view$1.onclick(view.java:3809) @ android.view.view.performclick(view.java:4421) @ android.view.view$performclick.run(view.java:17903) @ android.os.handler.handlecallback(handler.java:730) @ android.os.handler.dispatchmessage(handler.java:92) @ android.os.looper.loop(looper.java:213) @ android.app.activitythread.main(activitythread.java:5225) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:525) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:741) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:557) @ dalvik.system.nativestart.main(native method)

the java function i'm using :

public static void recognise(context context, file sampledir, file testfile) {      // debug-1     if(sampledir!=null)         log(context, "1. sampledir ok. " + testfile.getabsolutepath());     else {         log(context, "1. sampledir null");         return;     }       filenamefilter pngfilter = new filenamefilter() {         public boolean accept(file dir, string name) {             return name.tolowercase().endswith(".png");         }     };      file[] imagefiles = sampledir.listfiles(pngfilter);      // debug-2     if(imagefiles!=null) {         log(context, "2. imagefile ok, files :");         for(file imagefile : imagefiles)             log(context, "file : " + imagefile.getabsolutepath() );     }     else {         log(context, "2. imagefile array null");         return;     }      // debug-.5     if(testfile!=null)         log(context, "2.5. testfile ok. " + testfile.getabsolutepath());     else {         log(context, "2.5. testfile null");         return;     }      iplimage testimage = cvloadimage(testfile.getabsolutepath());     // debug-3     if(imagefiles!=null)         log(context, "3. testimageipl ok");     else {         log(context, "3. testimageipl null");         return;     }      matvector images = new matvector(imagefiles.length);      int[] labels = new int[imagefiles.length];      int counter = 0;     int label;      iplimage img;     iplimage grayimg;      (file image : imagefiles) {         // image , label:         img = cvloadimage(image.getabsolutepath());         label = integer.parseint(image.getname().split("\\-")[0]);          // convert image gray scale:         grayimg = iplimage.create(img.width(), img.height(), ipl_depth_8u, 1);         cvcvtcolor(img, grayimg, cv_bgr2gray);         // append in image list:         images.put(counter, grayimg);         // , in labels list:         labels[counter] = label;         // increase counter next image:         counter++;     }      //facerecognizer facerecognizer = createfisherfacerecognizer();     facerecognizer facerecognizer = createeigenfacerecognizer();     // facerecognizer facerecognizer = createlbphfacerecognizer();      facerecognizer.train(images, labels);      // load test image:     iplimage greytestimage = iplimage.create(testimage.width(), testimage.height(), ipl_depth_8u, 1);     cvcvtcolor(testimage, greytestimage, cv_bgr2gray);      // , prediction:     //int predictedlabel = facerecognizer.predict(greytestimage);     //system.out.println("predicted label: " + predictedlabel);      int[] imagelabels = new int[1];     double[] confidences = new double[1];      facerecognizer.predict(greytestimage, imagelabels, confidences);      log(context, "result : label - " + imagelabels[0] + "  conf - " + confidences[0]);   } 

i solved after 2 days... suppose load library manually. added few lines

    system.load("/data/data/com.ifta.face/lib/libopencv_photo.so");     system.load("/data/data/com.ifta.face/lib/libopencv_flann.so");     system.load("/data/data/com.ifta.face/lib/libopencv_features2d.so");     system.load("/data/data/com.ifta.face/lib/libopencv_calib3d.so");     system.load("/data/data/com.ifta.face/lib/libopencv_ml.so");     system.load("/data/data/com.ifta.face/lib/libopencv_video.so");     system.load("/data/data/com.ifta.face/lib/libopencv_legacy.so");     system.load("/data/data/com.ifta.face/lib/libopencv_objdetect.so");     system.load("/data/data/com.ifta.face/lib/libopencv_gpu.so");     system.load("/data/data/com.ifta.face/lib/libopencv_nonfree.so");     system.load("/data/data/com.ifta.face/lib/libopencv_contrib.so"); 

and 1 thing found out libraries having names "libjni*.so" loaded automatically , "libopencv_*.so" have load manually. loading sequence must mentioned above because libraries dependent on former ones. 1 know why happening ?